| Abbreviation | Definition |
|---|---|
| PSF | Pounds per Square Foot |
| PSIA | Pounds Per Square Inch, Absolute |
| PSID | Pounds Per Square Inch, Differential |
| PSIG | Pounds Per Square Inch, Gauge |
| PSM | Pounds per Square Meter |
| PT | PetaByte |
| PT | Pint |
| pt. | part |
| pt. | pint |
| PTB | Pounds per Thousand Barrels |
| PTE | Passenger Tire Equivalent |
| PTPM | Per Thousand Passenger Miles |
| pts. | parts |
| PTU | Personal Time Units |
| PU | Per Unit |
| PU | Physical Units |
| PUM | Purchase Unit of Measure |
| PVU | Potential Vorticity Unit |
| PW | Per Week |
| PWK | Windkessel Pressure |